JP5356848B2 - Grommet - Google Patents

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JP5356848B2
JP5356848B2 JP2009023965A JP2009023965A JP5356848B2 JP 5356848 B2 JP5356848 B2 JP 5356848B2 JP 2009023965 A JP2009023965 A JP 2009023965A JP 2009023965 A JP2009023965 A JP 2009023965A JP 5356848 B2 JP5356848 B2 JP 5356848B2
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diameter
bellows
tube portion
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bellows tube
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JP2010182501A (en
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秀俊 佐藤
知和 澤田
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Yazaki Corp
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Yazaki Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a grommet capable of regulating a bending direction and a bending amount without deflecting an axial center and forming an ideal bending shape. <P>SOLUTION: The grommet 1 is provided with a pair of engaging tube parts 2 which are insertion engaged with the holes 5, 7 provided in panels 4, 6 and a connecting tube part 3 which connects the pair of engaging tube parts 2 and has a bellows tube part 11 which is formed in bellows shape by arranging a plurality of crest parts a and valley parts b alternately in an identical pitch at least at the central part and has a constant thickness throughout the whole length, both in one body. As the crest part a, a small diameter crest part 12a and a large diameter crest part 22a which is formed in an outer diameter B1 larger than the outer diameter B1 of the small diameter crest part 12a are provided, and the inner diameter A1 of the valley part is formed constant throughout the whole length of the bellows tube part 11. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、ゴムなどの弾性材料で構成されて、互いの間隔をあけた一対のパネル間に架け渡されるワイヤハーネスを内側に収容するグロメットに関する。   The present invention relates to a grommet that is made of an elastic material such as rubber and accommodates a wire harness that is spanned between a pair of panels spaced apart from each other.

移動体としての自動車には、一般に、ヘッドランプ及びテールランプなどのランプ類、スタータモータ及びエアコンディショナ用のモータ等のモータ類、などの多種多様な電子機器が搭載されている。   In general, automobiles as moving bodies are equipped with a wide variety of electronic devices such as lamps such as head lamps and tail lamps, and motors such as motors for starter motors and air conditioners.

前述した多種多様な電子機器に電力を供給するために、前記自動車は、ワイヤハーネスを配索している。ワイヤハーネスは、互いに束ねられた複数の電線と、これらの電線の端末などに取り付けられたコネクタなどを備えている。この種のワイヤハーネスは、自動車の車体を構成する車体パネルとこの車体パネルに対して回転自在なトランクパネルとに亘って架け渡されることがあり、この架け渡されたワイヤハーネスを保護するために従来から種々のグロメット(特許文献1参照)が用いられている。   In order to supply power to the various electronic devices described above, the automobile has a wire harness. The wire harness includes a plurality of electric wires bundled with each other and connectors attached to terminals of these electric wires. This type of wire harness may be bridged across a vehicle body panel that constitutes the body of an automobile and a trunk panel that is rotatable with respect to the vehicle body panel. In order to protect this wire harness Conventionally, various grommets (see Patent Document 1) have been used.

この特許文献1に示されたグロメットは、ゴムなどの弾性材料で構成され、かつ前述した車体パネルとトランクパネルとのそれぞれに設けられた孔内に嵌合する筒状の一対の嵌合筒部と、これら一対の嵌合筒部同士を連結した筒状の連結筒部とを一体に備えている。連結筒部は、嵌合筒部に連なった円筒状でかつ前記嵌合筒部よりも小径の小径筒部と、これらの小径筒部間に設けられかつ山部と谷部で形成された蛇腹状のヒダを有する蛇腹筒部とを備えている。蛇腹筒部の一方の半周面側には、他方の半周面側に設けられている山部と谷部の高低差よりも大きいヒダが、設けられている。そして、前記一方の半周面側と前記他方の半周面側とが、前記蛇腹筒部のねじれ方向に沿って長手方向に螺旋状に配列されている。   The grommet shown in this Patent Document 1 is made of an elastic material such as rubber, and a pair of cylindrical fitting cylinder portions that fit into holes provided in the above-described body panel and trunk panel, respectively. And a cylindrical connecting tube portion in which the pair of fitting tube portions are connected to each other. The connecting cylinder part has a cylindrical shape that is continuous with the fitting cylinder part and has a smaller diameter than the fitting cylinder part, and a bellows that is provided between these small diameter cylinder parts and that is formed by a peak part and a valley part. And a bellows tube portion having a pleated shape. On one half circumferential surface side of the bellows tube portion, a fold larger than the height difference between the peak portion and the valley portion provided on the other half circumferential surface side is provided. The one half circumferential surface side and the other half circumferential surface side are spirally arranged in the longitudinal direction along the twist direction of the bellows tube portion.

前述したグロメットは、一方の嵌合筒部と連結筒部と他方の嵌合筒部とに亘って即ち全長に亘って筒状に形成されて、内側にワイヤハーネスを通す。そして、グロメットは、一方の嵌合筒部が車体パネルとトランクパネルとのうちの一方に設けられた孔内に嵌合し、他方の嵌合筒部が車体パネルとトランクパネルとのうちの他方に設けられた孔内に嵌合して、ワイヤハーネスを車体パネルとトランクパネルとに亘って配索する。そして、グロメットは、蛇腹筒部の一方の半周面側に設けた山部と谷部の高低差の大きいヒダによって、ドア開閉に伴うねじれを小さくすると共に、グロメットのつぶれ変形や取付部のはずれを防止し、ワイヤハーネスの保護性能を向上させている。   The above-described grommet is formed in a cylindrical shape over one fitting tube portion, the connecting tube portion, and the other fitting tube portion, that is, over the entire length, and passes the wire harness inside. In the grommet, one fitting tube portion is fitted in a hole provided in one of the vehicle body panel and the trunk panel, and the other fitting tube portion is the other of the vehicle body panel and the trunk panel. The wire harness is routed between the vehicle body panel and the trunk panel. The grommet reduces the twist caused by the opening and closing of the door and the deformation of the grommet and the slipping of the mounting part by a fold having a large height difference between the crest and trough provided on one half circumferential surface side of the bellows cylinder part. Preventing and improving the protection performance of the wire harness.

特開平10−199352号公報JP-A-10-199352

前述した特許文献1に記載されたグロメットは、蛇腹筒部の一方の半周面側に山部と谷部の高低差の大きいヒダを設け、他方の半周面側には一方の半周面側に設けたヒダより小さいヒダを設けて、かつ、前記一方の半周面側と前記他方の半周面側とが、あらかじめドア全開時の前記蛇腹筒部のねじれ方向に沿って長手方向に螺旋状に配列されている。そのため、蛇腹筒部の軸芯が偏心し、グロメットにワイヤハーネスを通す作業が困難となり、偏心していないグロメットと比べると作業効率が劣ってしまうという問題が生じる。   The grommet described in Patent Document 1 described above is provided with a fold having a large height difference between a peak portion and a valley portion on one half circumferential surface side of the bellows cylinder portion, and provided on one half circumferential surface side on the other half circumferential surface side. The one half circumferential surface side and the other half circumferential surface side are previously spirally arranged in the longitudinal direction along the twisted direction of the bellows tube portion when the door is fully opened. ing. For this reason, the shaft core of the bellows tube portion is eccentric, making it difficult to pass the wire harness through the grommet, resulting in a problem that the working efficiency is inferior compared to a grommet that is not eccentric.

したがって、本発明の目的は、軸芯を偏心することなく屈曲方向および屈曲量を規制することができ、かつ、理想的な屈曲形状にすることができるグロメットを提供することにある。   Accordingly, an object of the present invention is to provide a grommet that can regulate the bending direction and the amount of bending without decentering the shaft core and can have an ideal bent shape.

前記課題を解決し目的を達成するために、請求項1記載の発明は、パネルに設けられた孔内に嵌合する一対の嵌合筒部と、前記一対の嵌合筒部同士を連結し、かつ、少なくとも中央部に複数の山部と谷部とを交互に同一のピッチに並べて蛇腹状に形成されていると共に全長に亘って厚みが一定の蛇腹筒部を設けた連結筒部と、を一体に備えたグロメットにおいて、前記山部として、小径山部と、前記小径山部の外径よりも大きい外径に形成された大径山部と、が設けられ、そして、前記谷部の内径が、前記蛇腹筒部の全長に亘って一定に形成されていることを特徴としている。   In order to solve the above-mentioned problems and achieve the object, the invention according to claim 1 connects a pair of fitting cylinder parts fitted in a hole provided in a panel and the pair of fitting cylinder parts. And the connecting cylinder part which provided the bellows cylinder part with a constant thickness over the whole length formed in a bellows shape by arranging a plurality of peaks and valleys alternately at the same pitch at the center part, In the grommet provided integrally, a small-diameter ridge portion and a large-diameter ridge portion formed to have an outer diameter larger than the outer diameter of the small-diameter ridge portion are provided as the ridge portion, and An inner diameter is formed constant over the entire length of the bellows tube portion.

請求項2に記載の本発明のグロメットは、請求項1記載のグロメットにおいて、前記大径山部が、前記蛇腹筒部の中央部に設けられ、かつ、前記小径山部が、前記蛇腹筒部の両端部に設けられていることを特徴としている。   A grommet according to a second aspect of the present invention is the grommet according to the first aspect, wherein the large-diameter ridge portion is provided at a central portion of the bellows cylinder portion, and the small-diameter ridge portion is the bellows cylinder portion. It is characterized by being provided at both ends.

請求項3に記載の本発明のグロメットは、請求項2記載のグロメットにおいて、前記大径山部が、前記蛇腹筒部の中央部の当該蛇腹筒部の軸芯を挟んで相対する位置に設けられ、かつ、 前記小径山部が、前記相対する大径山部間でかつ前記蛇腹筒部の軸芯を挟んで相対する位置に設けられていることを特徴としている。   A grommet according to a third aspect of the present invention is the grommet according to the second aspect, wherein the large-diameter ridge is provided at a position facing the bellows cylinder portion at the center of the bellows cylinder portion. The small-diameter ridges are provided between the opposing large-diameter ridges and at positions facing each other across the axis of the bellows cylinder portion.

請求項4に記載の本発明のグロメットは、請求項3記載のグロメットにおいて、前記大径山部が、前記蛇腹筒部の中央部の断面の一部に設けられ、かつ、前記小径山部が、前記蛇腹筒部の中央部の断面の他の部分に設けられていることを特徴としている。   A grommet according to a fourth aspect of the present invention is the grommet according to the third aspect, wherein the large-diameter ridge is provided in a part of a cross section of the central portion of the bellows tube portion, and the small-diameter ridge is The bellows tube portion is provided in another portion of the cross section of the central portion of the bellows tube portion.

以上説明したように請求項1記載の発明によれば、山部として、小径山部と、その小径山部より大きい外径に形成された大径山部とが設けられ、そして、谷部の内径が蛇腹筒部の全長に亘って一定に形成されている。このため、大径山部が、当該大径山部同士が離れる方向に広がりやすく曲がりやすいので、グロメットの曲がり方を調整することができる。また、蛇腹筒部の曲がる方向を規制することができるので、当該蛇腹筒部即ち連結筒部が車体パネルなどに接触することを防止することができる。   As described above, according to the first aspect of the present invention, as the peak portion, the small-diameter peak portion and the large-diameter peak portion having a larger outer diameter than the small-diameter peak portion are provided, and The inner diameter is constant over the entire length of the bellows cylinder. For this reason, the large-diameter ridges are easy to spread in the direction in which the large-diameter ridges are separated from each other, and are easy to bend. Further, since the bending direction of the bellows tube portion can be restricted, it is possible to prevent the bellows tube portion, that is, the connecting tube portion from coming into contact with the vehicle body panel or the like.

また、谷部の内径が蛇腹筒部の全長に亘って一定にして形成されているので、蛇腹筒部の軸芯が偏心しない。このため、グロメットにワイヤハーネスを通す作業を効率よく行うことができる。   In addition, since the inner diameter of the valley portion is formed constant over the entire length of the bellows tube portion, the axis of the bellows tube portion is not eccentric. For this reason, the operation | work which lets a wire harness pass to a grommet can be performed efficiently.

請求項2に記載した本発明のグロメットによれば、大径山部が蛇腹筒部の中央部に設けられ、小径山部が蛇腹筒部の両端部に設けられている。このため、大径山部が設けられた蛇腹筒部の中央部は、小径山部が設けられた蛇腹筒部の両端部より曲がりやすい。つまり、大径山部が設けられた部分が曲がりやすく、小径山部が設けられた部分が曲がりにくくなる。そのため、蛇腹筒部の曲がる方向を規制することができると共に、グロメットの屈曲形状を規制することが可能である。さらに、前記蛇腹筒部即ち連結筒部が車体パネルなどに接触することを防止できる。   According to the grommet of the present invention as set forth in claim 2, the large diameter peak portion is provided at the center portion of the bellows tube portion, and the small diameter peak portion is provided at both ends of the bellows tube portion. For this reason, the center part of the bellows cylinder part provided with the large diameter peak part is more easily bent than both end parts of the bellows cylinder part provided with the small diameter peak part. That is, the portion provided with the large-diameter mountain portion is easily bent, and the portion provided with the small-diameter mountain portion is difficult to bend. Therefore, it is possible to regulate the bending direction of the bellows tube portion and to regulate the bent shape of the grommet. Further, the bellows tube portion, that is, the connecting tube portion can be prevented from coming into contact with the vehicle body panel or the like.

請求項3に記載した本発明のグロメットによれば、大径山部が、蛇腹筒部の中央部の当該蛇腹筒部の軸芯を挟んで相対する位置に設けられ、かつ、前記小径山部が、前記相対する大径山部間でかつ前記蛇腹筒部の軸芯を挟んで相対する位置に設けられている。このため、蛇腹筒部の中央部に大径山部が設けられた部分が曲がりやすく、蛇腹筒部の両端部に小径山部が設けられた部分が曲がりにくくなる。そのため、蛇腹筒部の曲がる方向を規制することができ、当該蛇腹筒部即ち連結筒部が車体パネルなどに接触することを確実に防止できる。   According to the grommet of the present invention described in claim 3, the large-diameter mountain portion is provided at a position facing the shaft center of the bellows tube portion at the center of the bellows tube portion, and the small-diameter mountain portion. However, it is provided in the position which opposes on both sides of the axial center of the said bellows cylinder part between the said large diameter peak parts. For this reason, the part in which the large diameter peak part was provided in the center part of the bellows cylinder part is easy to bend, and the part in which the small diameter peak part was provided in the both ends of the bellows cylinder part becomes difficult to bend. Therefore, the bending direction of the bellows tube portion can be restricted, and the bellows tube portion, that is, the connecting tube portion can be reliably prevented from coming into contact with the vehicle body panel or the like.

請求項4に記載した本発明のグロメットによれば、大径山部が、蛇腹筒部の中央部の断面の一部に設けられ、かつ、小径山部が前記蛇腹筒部の中央部の断面の他の部分に設けられている。このため、蛇腹筒部の中央部の断面の一部に大径山部が設けられた部分が、当該大径山部同士が離れる方向に曲がりやすくなり、当該大径山部同士が近づく方向に曲がりにくくなる。そのため、蛇腹筒部の曲がる方向を規制することができると共に、グロメットの屈曲形状を規制することが可能である。さらに、前記蛇腹筒部即ち連結筒部が車体パネルなどに接触することを防止することができる。   According to the grommet of the present invention described in claim 4, the large-diameter peak portion is provided in a part of the cross section of the central portion of the bellows tube portion, and the small-diameter peak portion is a cross section of the central portion of the bellows tube portion. It is provided in other parts. For this reason, the portion in which the large-diameter ridge portion is provided in a part of the cross section of the central portion of the bellows tube portion is easily bent in the direction in which the large-diameter ridge portions are separated from each other, and in the direction in which the large-diameter ridge portions approach It becomes difficult to bend. Therefore, it is possible to regulate the bending direction of the bellows tube portion and to regulate the bent shape of the grommet. Furthermore, it is possible to prevent the bellows tube portion, that is, the connecting tube portion from coming into contact with the vehicle body panel or the like.

本発明の第1の実施形態に係るグロメットの断面を示す斜視図である。It is a perspective view which shows the cross section of the grommet which concerns on the 1st Embodiment of this invention. 図1中のI−I線に沿う断面図である。It is sectional drawing which follows the II line | wire in FIG. (a)が図2中のII−II線に沿う断面図であり、(b)が図2中のIII−III線に沿う断面図である。(A) is sectional drawing which follows the II-II line in FIG. 2, (b) is sectional drawing which follows the III-III line in FIG. 本発明の第2の実施形態に係るグロメットの断面を示す斜視図である。It is a perspective view which shows the cross section of the grommet which concerns on the 2nd Embodiment of this invention. 図5中のIV−IV線に沿う断面図である。It is sectional drawing which follows the IV-IV line | wire in FIG. (a)が図5中のV−V線に沿う断面図であり、(b)が図5中のVI−VI線に沿う断面図である。(A) is sectional drawing which follows the VV line in FIG. 5, (b) is sectional drawing which follows the VI-VI line in FIG. 図1に示されたグロメットの変形例を示す斜視図である。It is a perspective view which shows the modification of the grommet shown by FIG. 図1に示されたグロメットの他の変形例を示す斜視図である。It is a perspective view which shows the other modification of the grommet shown by FIG.

以下、本発明の第1実施形態に係るグロメットを図1ないし図6に基づいて説明する。本実施形態に係る図1に示すグロメット1は、移動体としての自動車に搭載される。   Hereinafter, a grommet according to a first embodiment of the present invention will be described with reference to FIGS. The grommet 1 shown in FIG. 1 according to this embodiment is mounted on an automobile as a moving body.

グロメット1は、ゴムなどの弾性材料で構成され、かつ、図1に示すように、一対の嵌合筒部2と、一つの連結筒部3とを一体に備えている。   The grommet 1 is made of an elastic material such as rubber, and as shown in FIG. 1, the grommet 1 is integrally provided with a pair of fitting tube portions 2 and one connecting tube portion 3.

嵌合筒部2は、外観が厚手の円盤状の円筒状に形成されている。一方の嵌合筒部2は、前記自動車の車体を構成するパネルとしての車体パネル4(図1に一点鎖線で示す)に設けられた孔5内に嵌合して、当該車体パネル4に取り付けられる。他方の嵌合筒部2は、前記自動車の車体パネル4に対して回転自在に設けられたパネルとしてのトランクパネル6(図1に一点鎖線で示す)に設けられた孔7内に嵌合して、当該トランクパネル6に取り付けられる。   The fitting cylinder part 2 is formed in a thick disk-like cylindrical shape. One fitting cylinder portion 2 is fitted into a hole 5 provided in a vehicle body panel 4 (shown by a one-dot chain line in FIG. 1) as a panel constituting the vehicle body of the automobile, and is attached to the vehicle body panel 4. It is done. The other fitting cylinder portion 2 is fitted in a hole 7 provided in a trunk panel 6 (shown by a one-dot chain line in FIG. 1) as a panel provided rotatably with respect to the vehicle body panel 4 of the automobile. And attached to the trunk panel 6.

また、一方の嵌合筒部2には、外側小径筒部8が連なっている。外側小径筒部8は、外径が一方の嵌合筒部2よりも小径の円筒状に形成されており、当該一方の嵌合筒部2の内縁部から他方の嵌合筒部2よりも離れる方向に延在しているとともに、当該一方の嵌合筒部2と同軸に配置されている。   Further, the outer small-diameter cylindrical portion 8 is connected to one fitting cylindrical portion 2. The outer small-diameter cylindrical part 8 is formed in a cylindrical shape whose outer diameter is smaller than that of the one fitting cylinder part 2, and from the inner edge part of the one fitting cylinder part 2 to the other fitting cylinder part 2. While extending in the direction of leaving, it is arranged coaxially with the one fitting tube portion 2.

さらに、他方の嵌合筒部2には、ワイヤハーネス固定片9が連なっている。ワイヤハーネス固定片9は、帯板状に形成されており、当該他方の嵌合筒部2の内縁部から一方の嵌合筒部2よりも離れる方向に延在している。   Furthermore, a wire harness fixing piece 9 is connected to the other fitting cylinder portion 2. The wire harness fixing piece 9 is formed in a strip shape, and extends from the inner edge portion of the other fitting tube portion 2 in a direction away from the one fitting tube portion 2.

連結筒部3は、図1及び図2に示すように、一対の小径筒部10(図1に示す)と、一つの蛇腹筒部11とを備えている。小径筒部10は、それぞれ、嵌合筒部2に連なった円筒状に形成されている。小径筒部10は、嵌合筒部2から互いに近づく方向に延在している。小径筒部10は、外径が嵌合筒部2の外径よりも小さく形成されている。また、小径筒部10は、その全長に亘って外径が一定に形成されている。   As shown in FIGS. 1 and 2, the connecting cylinder part 3 includes a pair of small diameter cylinder parts 10 (shown in FIG. 1) and one bellows cylinder part 11. Each of the small-diameter cylindrical portions 10 is formed in a cylindrical shape that is continuous with the fitting cylindrical portion 2. The small-diameter cylindrical portion 10 extends from the fitting cylindrical portion 2 in a direction approaching each other. The small diameter cylindrical portion 10 is formed so that the outer diameter is smaller than the outer diameter of the fitting cylindrical portion 2. Moreover, the small diameter cylinder part 10 is formed with the constant outer diameter over the full length.

蛇腹筒部11は、一対の小径筒部10間に配置されかつこれら一対の小径筒部10を互いに連結している。蛇腹筒部11は、複数の山部12a、22aと谷部12bとを有し、円筒状に形成されていている。前記複数の山部および谷部は、蛇腹筒部11の長手方向に交互に同一のピッチに並べられて、蛇腹筒部11が蛇腹状に形成されている。そして、蛇腹筒部11が全長に亘って厚みが一定に形成されている。   The bellows tube portion 11 is disposed between the pair of small diameter tube portions 10 and connects the pair of small diameter tube portions 10 to each other. The bellows tube portion 11 has a plurality of peak portions 12a, 22a and a valley portion 12b, and is formed in a cylindrical shape. The plurality of peaks and valleys are alternately arranged at the same pitch in the longitudinal direction of the bellows tube portion 11, and the bellows tube portion 11 is formed in a bellows shape. And the bellows cylinder part 11 is formed in constant thickness over the full length.

ここで、本発明では、小径筒部10の外周面と小径筒部10の内周面との中心を通る中心線Q(図2中に点線で示す)よりも外側に形成されているものを山部12a、22aとし、前記中心線Qよりも内側に形成されているものを谷部12bと定義する。したがって、谷部12bは、蛇腹筒部11の外側に一定に形成されている。すなわち、谷部12bの内径は一定である。   Here, in this invention, what is formed in the outer side rather than the centerline Q (it shows with a dotted line in FIG. 2) passing through the center of the outer peripheral surface of the small diameter cylindrical part 10, and the inner peripheral surface of the small diameter cylindrical part 10 is used. The peaks 12a and 22a are defined as valleys 12b that are formed inside the center line Q. Therefore, the trough portion 12 b is formed on the outer side of the bellows tube portion 11. That is, the inner diameter of the valley 12b is constant.

山部として、図2に示すように、小径山部12aと、前記小径山部の外径よりも大きい外径に形成された大径山部22aと、が設けられている。小径山部12aおよび大径山部22aの内径A1は、蛇腹筒部の全長に亘って同一に形成されている。そして、小径山部12aの外径B1は、大径山部22aの外径C1より小さく形成されている。   As shown in FIG. 2, a small-diameter ridge portion 12 a and a large-diameter ridge portion 22 a having an outer diameter larger than the outer diameter of the small-diameter ridge portion are provided as the ridge portions. Inner diameter A1 of the small diameter peak part 12a and the large diameter peak part 22a is formed uniformly over the full length of a bellows cylinder part. And the outer diameter B1 of the small diameter peak part 12a is formed smaller than the outer diameter C1 of the large diameter peak part 22a.

小径山部12aは、蛇腹筒部11の両端部に全周に亘って設けられている。そして、小径山部12aの外径B1は、一対の小径筒部10の外径と等しく形成されている。また、小径山部12aは、谷部12bと交互に並んで形成されている。   The small-diameter mountain portion 12a is provided on both ends of the bellows tube portion 11 over the entire circumference. The outer diameter B1 of the small-diameter mountain portion 12a is formed to be equal to the outer diameter of the pair of small-diameter cylindrical portions 10. Further, the small-diameter ridges 12a are formed alternately with the valleys 12b.

大径山部22aは、蛇腹筒部11の中央部の当該蛇腹筒部11の軸芯(中心軸)P(図1中に一点鎖線で示す)を挟んで相対する位置に設けられている。さらに、蛇腹筒部11の中央部の大径山部22aの間には、小径山部12aが設けられている。そして、大径山部22aは、谷部12bの外径A1を一定のままで、前記蛇腹筒部11の両端部に設けられた小径山部22aよりも大きく形成されている。また、大径山部22aは、谷部12bと交互に並んで形成されている。   The large-diameter peak portion 22a is provided at a position opposite to the center of the bellows tube portion 11 with an axis (center axis) P (indicated by a one-dot chain line in FIG. 1) of the bellows tube portion 11 in between. Further, a small-diameter mountain portion 12 a is provided between the large-diameter mountain portions 22 a at the center of the bellows tube portion 11. And the large diameter peak part 22a is formed larger than the small diameter peak part 22a provided in the both ends of the said bellows cylinder part 11, keeping the outer diameter A1 of the trough part 12b constant. The large-diameter peak portions 22a are formed alternately with the valley portions 12b.

また、一対の小径筒部10の中心軸は、小径山部12aおよび大径山部22aが設けられた蛇腹筒部11の軸芯Pと等しい。このため、偏心することはない。   Moreover, the central axis of a pair of small diameter cylinder part 10 is equal to the axial center P of the bellows cylinder part 11 in which the small diameter peak part 12a and the large diameter peak part 22a were provided. For this reason, there is no eccentricity.

図2に示すように、蛇腹筒部11の中央部に設けられた大径山部22aの外径C1は、蛇腹筒部の内径A1が一定のままで、小径山部12aの外径B1よりも大きく形成されている。すなわち、谷部12bの内径および谷部12bの内径が一定のままで、大径山部22aの外径C1は、小径山部12aの外径B1より大きく形成されている。   As shown in FIG. 2, the outer diameter C1 of the large-diameter peak portion 22a provided at the center of the bellows cylinder portion 11 is larger than the outer diameter B1 of the small-diameter peak portion 12a while the inner diameter A1 of the bellows cylinder portion remains constant. Is also formed large. That is, the outer diameter C1 of the large-diameter peak portion 22a is formed larger than the outer diameter B1 of the small-diameter peak portion 12a while the inner diameter of the valley portion 12b and the inner diameter of the valley portion 12b remain constant.

図3(a)に示すように、小径山部12aで形成された蛇腹筒部11の両端部は、断面円形状に形成されている。そして、谷部12bで形成された蛇腹筒部11の両端部は、断面円形状の形成されている。   As shown in FIG. 3A, both end portions of the bellows tube portion 11 formed by the small-diameter mountain portion 12a are formed in a circular cross section. And the both ends of the bellows cylinder part 11 formed of the trough part 12b are formed in the cross-sectional circle shape.

また、図3(b)に示すように、大径山部22aおよび小径山部12aとで形成された蛇腹筒部の中央部は、断面楕円形状に形成され、蛇腹筒部11の軸芯Pを挟んで互いに相対する位置で上下方向Wに大きく形成されている。   Further, as shown in FIG. 3B, the central part of the bellows cylinder part formed by the large diameter peak part 22a and the small diameter peak part 12a is formed in an elliptical cross section, and the axis P of the bellows cylinder part 11 is formed. It is formed large in the vertical direction W at a position facing each other with respect to each other.

連結筒部3は、図1に示すように、一対の小径筒部10とこれらの小径筒部10間に設けられた蛇腹筒部11とを備えて、中央部に蛇腹筒部11を設けている。   As shown in FIG. 1, the connecting tube portion 3 includes a pair of small-diameter tube portions 10 and a bellows tube portion 11 provided between the small-diameter tube portions 10, and the bellows tube portion 11 is provided in the center portion. Yes.

前述した構成のグロメット1は、外側小径筒部8と一方の嵌合筒部2と連結筒部3と他方の嵌合筒部2とに亘って即ち全長に亘って円筒状に形成されて、内側に前述した自動車に配索されるワイヤハーネス13(図1中に二点鎖線で示す)を通す。そして、グロメット1は、ハーネス固定片9とワイヤハーネス13の外周にテープが巻かれるとともに、外側小径筒部8とワイヤハーネス13の外周にテープが巻かれて、当該ワイヤハーネス13が固定される。   The grommet 1 having the configuration described above is formed in a cylindrical shape over the outer small-diameter cylindrical portion 8, the one fitting cylindrical portion 2, the connecting cylindrical portion 3, and the other fitting cylindrical portion 2, that is, over the entire length thereof. A wire harness 13 (indicated by a two-dot chain line in FIG. 1) routed through the automobile described above is passed inside. In the grommet 1, tape is wound around the outer periphery of the harness fixing piece 9 and the wire harness 13, and the tape is wound around the outer periphery of the outer small diameter cylindrical portion 8 and the wire harness 13, so that the wire harness 13 is fixed.

そして、グロメット1は、一方の嵌合筒部2が車体パネル4に設けられた孔5内に嵌合し、他方の嵌合筒部2がトランクパネル6に設けられた孔7内に嵌合して、ワイヤハーネス13を車体パネル4とトランクパネル6とに亘って配索する。そして、グロメット1は、蛇腹筒部11の大径山部22aが設けられた箇所を曲げて、理想的な屈曲形状を作る。そして、トランクパネル6が車体パネル4に対して回転して、連結筒部3の特に蛇腹筒部11が曲がったり伸ばされたりする際に、この連結筒部3の車体が車体パネル4やトランクパネル6などに接触して、破損することを防止する。   In the grommet 1, one fitting cylinder portion 2 is fitted in a hole 5 provided in the vehicle body panel 4, and the other fitting cylinder portion 2 is fitted in a hole 7 provided in the trunk panel 6. Then, the wire harness 13 is routed across the vehicle body panel 4 and the trunk panel 6. And the grommet 1 bends the location in which the large diameter peak part 22a of the bellows cylinder part 11 was provided, and makes an ideal bending shape. When the trunk panel 6 rotates with respect to the vehicle body panel 4 and the bellows tube portion 11 of the connection tube portion 3 is bent or extended, the vehicle body of the connection tube portion 3 becomes the vehicle body panel 4 or the trunk panel. 6 to prevent damage from contact.

本実施形態によれば、蛇腹筒部11の中央部に大径山部22aを設けているので、大径山部22aが設けられた蛇腹筒部の中央部分が曲がりやすく、大径山部22aが設けられていない部分、すなわち、小径山部12aが設けられた蛇腹筒部の両端部が曲がりにくくなる。つまり、大径山部22a同士が互いに離れる方向である図2中の相対方向Rに曲がりやすい。また、蛇腹筒部11が、大径山部22aが形成された方向である図3中の上下方向Wに曲がりやすく、左右方向Sに曲がりにくくなる。   According to the present embodiment, since the large-diameter ridge portion 22a is provided at the central portion of the bellows cylinder portion 11, the central portion of the bellows cylinder portion provided with the large-diameter ridge portion 22a is easily bent, and the large-diameter mountain portion 22a. Are not provided, that is, both end portions of the bellows tube portion provided with the small-diameter mountain portion 12a are not easily bent. That is, it is easy to bend in the relative direction R in FIG. Further, the bellows tube portion 11 is easy to bend in the vertical direction W in FIG. 3, which is the direction in which the large-diameter peak portion 22 a is formed, and is difficult to bend in the left-right direction S.

また、このように、蛇腹筒部11の内径A1を変えずに、蛇腹筒部11の軸芯Pを挟んで互いに相対する位置に大径山部22aを設けることで、軸芯Pを偏心することなく蛇腹筒部11の曲がる方向を規制することができる。そのため、グロメット1にワイヤハーネス13を通す作業を効率よく行うことができる。   In addition, in this way, the shaft core P is decentered by providing the large-diameter peak portions 22a at positions facing each other across the shaft core P of the bellows tube portion 11 without changing the inner diameter A1 of the bellows tube portion 11. The direction in which the bellows tube portion 11 bends can be regulated without any problem. Therefore, the operation of passing the wire harness 13 through the grommet 1 can be performed efficiently.

次に、本発明の第2の実施形態にかかるグロメット1を図5〜図7に基づいて説明する。なお、前述した第1の実施形態と同一部分には、同一符号を付して説明を省略する。   Next, the grommet 1 concerning the 2nd Embodiment of this invention is demonstrated based on FIGS. Note that the same parts as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

本実施形態では、図4および図5に示すように、大径山部32aが、蛇腹筒部11の中央部の断面の一部に設けられている。そして、小径山部12aが、前記蛇腹筒部11の中央部の他方の断面、および、当該蛇腹筒部11の両端部に設けられている。   In the present embodiment, as shown in FIGS. 4 and 5, the large-diameter mountain portion 32 a is provided in a part of the cross section of the central portion of the bellows tube portion 11. And the small diameter peak part 12a is provided in the other cross section of the center part of the said bellows cylinder part 11, and the both ends of the said bellows cylinder part 11. FIG.

図6(a)に示すように、小径山部12aで形成された蛇腹筒部11の両端部は、断面円形状に形成されている。そして、谷部12bで形成された蛇腹筒部11の両端部は、断面円形状に形成されている。また、図6(b)に示すように、一方の断面に大径山部32aと、他方の部分に小径山部12aとで形成された蛇腹筒部11は、大径山部32aが形成された一方の断面が半円形状に形成され、小径山部12aが形成された他方の断面が半楕円形状に形成されている。つまり、大径山部32aは、蛇腹筒部11の中央部の軸芯Pを挟んで断面の上側が大きく形成され、断面の下側が小径山部12aと同じ大きさの山部で形成されている。   As shown in FIG. 6A, both end portions of the bellows tube portion 11 formed by the small-diameter mountain portion 12a are formed in a circular cross section. And the both ends of the bellows cylinder part 11 formed of the trough part 12b are formed in the cross-sectional circle shape. Further, as shown in FIG. 6B, the bellows tube portion 11 formed of the large-diameter ridge portion 32a on one cross section and the small-diameter ridge portion 12a on the other portion is formed with a large-diameter ridge portion 32a. One of the cross sections is formed in a semicircular shape, and the other cross section in which the small-diameter peak portion 12a is formed is formed in a semi-elliptical shape. That is, the large-diameter ridge portion 32a is formed such that the upper side of the cross section is formed with the axis P at the center of the bellows cylinder portion 11 therebetween, and the lower side of the cross section is formed by a ridge portion having the same size as the small-diameter ridge portion 12a. Yes.

第2の実施形態においても、前述した第1の実施形態と同様に、連結筒部3即ち蛇腹筒部11が曲げられたり伸ばされたりする際に、大径山部32aが設けられた箇所、すなわち、蛇腹筒部11の中央部の断面の一部(上側)が、当該大径山部32a同士が離れる方向に曲がりやすく、当該大径山部32a同士が互いに近づく方向に曲がりにくくなる。このため、蛇腹筒部11が、大径山部32a同士が離れる方向である図5中の一方方向Xに曲がりやすく、大径山部32a同士が近づく他方方向Yに曲がりにくくなる。   Also in the second embodiment, as in the first embodiment described above, when the connecting tube portion 3, that is, the bellows tube portion 11 is bent or extended, a location where the large-diameter mountain portion 32 a is provided, That is, a part (upper side) of the cross section of the central portion of the bellows tube portion 11 is easily bent in a direction in which the large-diameter mountain portions 32a are separated from each other, and is difficult to bend in a direction in which the large-diameter mountain portions 32a are close to each other. For this reason, the bellows tube portion 11 is easily bent in one direction X in FIG. 5, which is a direction in which the large-diameter mountain portions 32 a are separated from each other, and is difficult to bend in the other direction Y in which the large-diameter mountain portions 32 a are close to each other.

このため、蛇腹筒部11の屈曲方向や屈曲量を規制することができると共に、理想的な屈曲形状にすることが可能である。また、蛇腹筒部11の軸芯Pを偏心させていないため、グロメット1にワイヤハーネス13を通す作業を効率よく行うことができる。そして、蛇腹筒部の屈曲方向および屈曲量を規制することができるので、蛇腹筒部11すなわち連結筒部3が車体パネル4やトランクパネル6に接触して破損することを防止することができる。   For this reason, while being able to regulate the bending direction and bending amount of the bellows cylinder part 11, it is possible to make it an ideal bending shape. In addition, since the axis P of the bellows tube portion 11 is not decentered, the work of passing the wire harness 13 through the grommet 1 can be performed efficiently. And since the bending direction and bending amount of a bellows cylinder part can be controlled, it can prevent that the bellows cylinder part 11, ie, the connection cylinder part 3, contacts the vehicle body panel 4 and the trunk panel 6, and is damaged.

なお、前述した第2の実施形態では、大径山部32aは、蛇腹筒部11の軸芯Pを挟んで当該蛇腹筒部11の中央部の上側の断面を大きく形成し、当該蛇腹筒部11の中央部の下側の断面を小径山部12aと同じ大きさの山部で形成した。しかしながら、本発明はこれに限定するものではなく、蛇腹筒部11の軸芯Pを挟んで当該蛇腹筒部11の中央部の上側の断面を小径山部12aと同じ大きさの山部で形成し、下側の断面を上側の断面より大きく形成してもよい。   In the second embodiment described above, the large-diameter peak portion 32a has a large cross section on the upper side of the central portion of the bellows tube portion 11 with the axis P of the bellows tube portion 11 interposed therebetween, and the bellows tube portion. The lower cross section of the central portion of 11 was formed with a ridge having the same size as the small-diameter ridge 12a. However, the present invention is not limited to this, and the cross section on the upper side of the central portion of the bellows cylinder portion 11 is formed by a peak portion having the same size as the small diameter peak portion 12a across the axis P of the bellows cylinder portion 11. The lower cross section may be formed larger than the upper cross section.

この場合には、大径山部32aが設けられた蛇腹筒部11の中央部の一部分である下側が、当該大径山部32a同士が互いに離れる方向に曲がりやすく、当該大径山部32a同士が互いに近づく方向に曲がりにくくなる。このため、軸芯Pを偏心することなく蛇腹筒部11の曲がる方向を規制することができると共に、グロメット1にワイヤハーネス13を通す作業を効率よく行うことができる。そして、連結筒部3の特に蛇腹筒部11が曲がったり伸ばされたりする際に、この連結筒部3の車体が車体パネル4やトランクパネル6などに接触して、破損することを防止する。   In this case, the lower side, which is a part of the central portion of the bellows tube portion 11 provided with the large-diameter ridge portions 32a, is easily bent in a direction in which the large-diameter ridge portions 32a are separated from each other, and the large-diameter ridge portions 32a are Are difficult to bend in the direction of approaching each other. For this reason, the direction in which the bellows tube portion 11 bends can be regulated without decentering the shaft core P, and the operation of passing the wire harness 13 through the grommet 1 can be performed efficiently. And when especially the bellows cylinder part 11 of the connection cylinder part 3 bends or is extended, it prevents that the vehicle body of this connection cylinder part 3 contacts the vehicle body panel 4, the trunk panel 6, etc., and is damaged.

また、本実施形態では、蛇腹筒部11の中央部に、蛇腹筒部11の軸芯Pを挟んで互いに相対する位置で大径山部22aを設けたが、本発明では、図7に示すように、蛇腹筒部11の端部に、蛇腹筒部11の軸芯Pを挟んで互いに相対する位置で大径山部22aを設けてもよい。さらに、図8に示すように、蛇腹筒部11の端部の断面の一部に大径山部32a、前記蛇腹筒部11の端部の他方の断面の一部に小径山部12aを設けても良い。これらの場合も、前述した実施形態と同様の効果を奏でる。   Further, in the present embodiment, the large-diameter ridge portion 22a is provided in the center portion of the bellows tube portion 11 at a position facing each other across the axis P of the bellows tube portion 11, but in the present invention, it is shown in FIG. As described above, the large-diameter ridge portion 22a may be provided on the end portion of the bellows tube portion 11 at a position facing each other across the axis P of the bellows tube portion 11. Further, as shown in FIG. 8, a large-diameter mountain portion 32a is provided in a part of the cross section of the end portion of the bellows tube portion 11, and a small-diameter mountain portion 12a is provided in a part of the other cross section of the end portion of the bellows tube portion 11. May be. In these cases, the same effects as those of the above-described embodiment can be obtained.

なお、前述した実施形態は本発明の代表的な形態を示したに過ぎず、本発明は、実施形態に限定されるものではない。即ち、本発明の骨子を逸脱しない範囲で種々変形して実施することができる。   In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

1 グロメット
2 嵌合筒部
3 連結筒部
4 車体パネル(パネル)
5、7 孔
6 トランクパネル(パネル)
11 蛇腹筒部
12a 小径山部
12b 谷部
22a、32a 大径山部
DESCRIPTION OF SYMBOLS 1 Grommet 2 Fitting cylinder part 3 Connection cylinder part 4 Car body panel (panel)
5, 7 holes 6 Trunk panel (panel)
11 Bellows cylinder part 12a Small diameter mountain part 12b Valley part 22a, 32a Large diameter mountain part

Claims (4)

パネルに設けられた孔内に嵌合する一対の嵌合筒部と、
前記一対の嵌合筒部同士を連結し、かつ、少なくとも中央部に複数の山部と谷部とを交互に同一のピッチに並べて蛇腹状に形成されていると共に全長に亘って厚みが一定の蛇腹筒部を設けた連結筒部と、を一体に備えたグロメットにおいて、
前記複数の山部として、小径山部と、前記小径山部の外径よりも大きい外径に形成された大径山部と、が設けられ、そして、
前記谷部の内径が、前記蛇腹筒部の全長に亘って一定に形成されていることを特徴とするグロメット。
A pair of fitting cylinders that fit into holes provided in the panel;
The pair of fitting tube portions are connected to each other, and a plurality of ridges and valleys are alternately arranged at the same pitch at the central portion and formed in a bellows shape, and the thickness is constant over the entire length. In the grommet provided integrally with the connecting cylinder part provided with the bellows cylinder part,
As the plurality of ridges, a small-diameter ridge, and a large-diameter ridge formed on an outer diameter larger than the outer diameter of the small-diameter ridge, and
A grommet in which an inner diameter of the valley portion is formed constant over the entire length of the bellows tube portion.
前記大径山部が、前記蛇腹筒部の中央部に設けられ、かつ、
前記小径山部が、前記蛇腹筒部の両端部に設けられていることを特徴とする請求項1に記載のグロメット。
The large-diameter ridge is provided at a central portion of the bellows tube portion; and
The grommet according to claim 1, wherein the small-diameter ridge portions are provided at both ends of the bellows tube portion.
前記大径山部が、前記蛇腹筒部の中央部の当該蛇腹筒部の軸芯を挟んで相対する位置に設けられ、かつ、
前記小径山部が、前記相対する大径山部間でかつ前記蛇腹筒部の軸芯を挟んで相対する位置に設けられていることを特徴とする請求項2に記載のグロメット。
The large-diameter ridge is provided at a position opposite to the axis of the bellows tube portion at the center of the bellows tube portion; and
The grommet according to claim 2, wherein the small-diameter ridges are provided between the opposing large-diameter ridges and facing each other across the axis of the bellows tube portion.
前記大径山部が、前記蛇腹筒部の中央部の断面の一部に設けられ、かつ、
前記小径山部が、前記蛇腹筒部の中央部の断面の他の部分に設けられていることを特徴とする請求項3に記載のグロメット。
The large-diameter ridge is provided in a part of a cross section of a central portion of the bellows tube portion; and
The grommet according to claim 3, wherein the small-diameter peak portion is provided in another portion of the cross section of the central portion of the bellows tube portion.
JP2009023965A 2009-02-04 2009-02-04 Grommet Active JP5356848B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0670424A (en) * 1992-08-13 1994-03-11 Fujikura Ltd Grommet
JPH09301098A (en) * 1996-05-10 1997-11-25 Yazaki Corp Door grommet
JP3580201B2 (en) * 1999-11-01 2004-10-20 住友電装株式会社 Grommets for wire harness

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